Chimpanzees are killing gorillas unprovoked for the first time: scientists
Undoubtedly, this will officially be attributed to global warming.
Also, note this is the first time that the “scientists” (evolutionary anthropologists, which is one of the guesswork speculative “sciences”) have seen it. It should not be taken to represent the first time in all of the existence of apes, great or otherwise, most of which happened before grad students were writing things down.